Name

ST_Disjoint — Returns TRUE if the Geometries do not "spatially
intersect" - if they do not share any space together.

Synopsis

boolean ST_Disjoint(
geometry
A
,
geometry
B);

Description

Overlaps, Touches, Within all imply geometries are not spatially disjoint. If any of the aforementioned
returns true, then the geometries are not spatially disjoint.
Disjoint implies false for spatial intersection.

Do not call with a GEOMETRYCOLLECTION as an argument

Performed by the GEOS module

This function call does not use indexes

NOTE: this is the "allowable" version that returns a
boolean, not an integer.